* {
    margin: 0;
    padding: 0;
    font-size: 14px;
}

#root {
    display: flex;
    flex-direction: column;
}

#vertical ul {
    list-style: none;
    width: 100px;
    margin: 10px;
}

#vertical li {
    background: #ccc;
    margin-bottom: 1px;
}

#vertical ul > li > a {
    display: block;
    text-align: center;
    height: 36px;
    line-height: 36px;
    text-decoration: none;
    color: black;
}

#vertical ul > li > a:hover {
    background-color: cadetblue;
    color: #fff;
}


#horizontal ul {
    margin: 10px;
    list-style: none;
}

#horizontal li {
    float: left;
    background: #ccc;
    margin-right: 1px;
}

#horizontal a {
    display: inline-block;
    box-sizing: border-box;
    width: 100px;
    height: 36px;
    line-height: 36px;
    text-align: center;
    color: black;
    font-size: 0.8rem;
    text-decoration: none;
}

#horizontal a:hover {
    background-color: cadetblue;
    color: white;
}

#oval .nav {
    margin: 10px;
    height: 36px;
    padding-left: 100px;
    border-bottom: 5px solid cadetblue;
}


#oval a {
    display: inline-block;
    width: 100px;
    line-height: 36px;
    height: 36px;
    text-align: center;
    color: black;
    font-size: 0.8rem;
    text-decoration: none;
    background-color: #ccc;
    border-radius: 10px 10px 0 0;
}

#oval a:hover, #stretch a:hover {
    background-color: cadetblue;
    color: white;
}

#oval a.current, #stretch a.current {
    background-color: cadetblue;
    color: white;
}

.topnav {
    overflow: hidden;
    background-color: #333;
}

.topnav a {
    float: left;
    display: block;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
}

.topnav a:hover {
    background-color: #ddd;
    color: black;
}

.topnav a.active {
    background-color: #4CAF50;
    color: white;
}

#stretch .nav {
    height: 36px;
    margin: 10px;
    border-bottom: 3px solid #000000;
    padding-left: 100px;
}

#stretch a {
    display: inline-block;
    text-align: center;
    line-height: 36px;
    text-decoration: none;
    width: 100px;
    color: black;
    float: left;
    margin-right: 2px;
    background-color: #ddd;
}